Rotary pump.



PATENTED JUNE 30, 1903.

B. PATTERSON.

ROTARY PUMP.

APILICIATION rum) APR. 26. 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

PATENT ED JUNE 30, 1903.

E. PATTERSON.

ROTARY PUMP.

APPLICATION FILED APR. 26, 1902.

2 SHEETS-SHEET 2.

H0 MODEL.

UNITED STATES Patented June 30. 1903.

EBBIN PATTERSON, OF CROWLEY, LOUISIANA.

ROTARY PUM P.

SPEGIFICATION forming part of Letters Patent No. 732,109, dated June 30, 1903.

Application filed April 26, 1902.

To all, whom it may concern:

Be it known that I, EBBIN PATTERSON,a citizen of the United States, residing at Crowley, in the parish of Acadia and State of Louisiana, have invented a new and useful Rotary Pum p, of which the following is a specification.

This invention relates to certain improvements in rotary pumps, and has for its principal object to provide a simple and compact form of combined lift and force pump in which the number of working parts is reduced to a minimum.

A further object of the invention is to so construct the pump as to reduce friction, to permit of the automatic takingup of wear, and to so construct the various pump members as to make the parts interchangeable and permit of the ready substitution of a new member in place of a worn or otherwise damaged member of the pump.

i/Vith these and other objects in view the invention consistsin the novel construction and arrangement of parts hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims.

In the drawings,Figure 1 is a transverse sectional elevation of a rotary pump con structed in accordance with my invention. Fig. 2 is a longitudinal sectional elevation of the same on the line 2 2 of Fig. 1 Figs. 3, 4-, and 5 are views of details of construction more specifically referred to hereinafter.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

On a suitable base or bed platelO is mounted a cylinder 11, having inlet .and outlet ports 12-and 13. The cylinder is substantially in the form ofan ellipse in transverse cross-section, being preferably formed of a number of arcuate members 14, 15, 16, and 17, the members 14 and 15 being provided with end ribs or lugs 18 for the passage of securing-bolts 10 and the adjacent ends of such members being recessed for thereceptiou of the opposite edges of the smaller cylinder members 16 and 17. The cylinder-heads 20 are clamped in place by bolts 21, extending completely across the cylinder, as shown in Fig. 2.

Serial No. 104,854. (No model.)

22 designates a shaft having an end beari g in a socket 233, formed in one of the cylinder-heads, and a second end bearing formed in a standard 24, carried by the base-plate. The shaft. passes through a suitable stuffingbox 25, carried by the cylinder-head, and at a point outside the cylinder is provided with a belt-wheel 26, by which it may be connected to any suitable source of power-supply, or the connection maybe made by gearing or Otherwise, in accordance with the character of the power. To the inner face of each of the cylinder-heads is secured an elliptical cam 27, the peripheral surface of which is parallel with the elliptical line of the cylinder and the section 15 of the cylinder and the corresponding, parallel face of the cam being both arranged on arcuatelines of which the axis of the shaft forms the center.

On the shaft 22 are secured two disks 30, forming the heads of the rotary piston, said disks being provided with a number of radially-disposed grooves 31 for the reception and support of the movable abutments or piston-blades 32, said blades being of a length equal to the distance between the inner walls of the cylinder-heads 20. Theouter face of each piston-blade is rounded to reduce frictionalcontactwith thecurvedinnersurface of the cylinder, and in order to-properly guide the blades and keep them in frictional contact with the cylinder-wall each blade is provided with a socket 33 for the reception of a pin 34:, provided with arecessed head 35, in which is fitted a roller 36, adapted for contact with the peripheral surface of the cam. The pin 34 is surrounded by a helically-disposed tension-spring 37, one end of which bears against the lower wall of the socket and the other against the shoulder on the pin, thus tending to separate the blade and roller and keep one in contact with the cylinder-wall and the other in contact with the surface of the cam.

As an additional blade-guiding means each sufficient length to permit the necessaryradial movement of the piston-blade. As the blades, pins, and rollers are all of the same construction, they may be manufactured in quantity at small cost and readily replaced when worn or otherwise damaged.

The shell of the piston is formed of four arcuate members 42, having flanged end portions 43, adapted to recesses 44, formed in the periphery of the circular heads 30 of the piston at points adjacent to the slots 31, the opposite faces of the ribs forming guides and supports for the main body of the movable blades throughout the entire length of the latter. At points about midway of their width each of the arcuate members is pro vided with a number'of inwardly-projecting recesses 45, through which pass securingbolts into threaded openings in the pistonheads, the recesses being of a depth sufficient to prevent the heads of the bolts projecting beyond the peripheral line of the shell, so that thelatter Where it comes into contact with the cylinder-section 14 forms a tight and practically liquid-proof joint to prevent the passage of liquid from one side of the cylinder to the other. In the cylinder are formed a number of openings, normally closed by threaded plugs 48, which may be removed to permit the insertion of a suitable wrench-to tighten the securing-bolts or to permit the application of lubricant to the blade-guiding sockets and pins and the rollers 36.

The pins 39 serve to reduce theamount of wear on the ends and outer faces of the abutments 32 and render the operation of the pump more easy by transferring the fulcrum-' of the piston.

The-construction of the pump is such that the working side, represented by the parallel lines of the cylinder member 15 and the corresponding surface of the piston permits of the steady application of power to the Water or otherliquid enteringsaid cylinder withoutthe reduction in area usualin devices of this class, and thus avoiding unnecessary friction between the working members and between the cylinder and the fluid and a waste of power incident to an attempt to force the fluid through a contracting space.

The pump may be employed as a suction or force pump for any ordinary purpose and may be employed as a submerged pump or situated on the surface of the ground, as desired. While the lines of the cylinder are not on the regular curve of a true ellipse, the cylinder is substantially elliptical in form, and the term has been used in the specification and claims in order to avoid confusion and toavoid unnecessary descriptive matter in the claims.

While the construction herein described, and illustrated in the accompanying drawings, is the preferred form of the device, it is obvious that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim is 1. The combination with a substantially elliptical cylinder, of a shaft, radially-slotted heads secured to said shaft, separable members forming the shell of they piston and having flanged sides seated in recesses in the cylinder-heads, and radially-movable abutments guided partially by the slots of the heads and partly by the shell members of the piston.

22. The combination of the substantially elliptical cylinder, ashaft, a piston-body carried by the shaft and comprising radially-slotted heads and separable shell members spaced to form guiding-openings for the piston-blades, piston -blades carried by said piston, and means for maintaining the outer edges of the blades in contact with the wall of the cylinder.

3. The combination of the substantially elliptical cylinder,a shaft,a piston carried by the" shaft and comprising radially-slottedheads each provided with peripheral recesses adjacent to the slots, separable shell members secured to the heads and having flanged edges fitted in said recesses, and radially-movable blades guided between said shell members.

4. The combination of the substantially elliptical cylinder,a shaft,a pistoncarried by the shaft and comprising radially-slotted heads having guiding-openings formed in the heads at points extending from the inner walls of the slots, radially-movable blades guided in said slots and having pins adapted to said guiding-openings, and removable shell members secured to said piston-heads.

5. The combination of the cylinder, cams secured thereto, a shaft, radially-slotted piston-heads carried by the shaft at points within the cams, radially-movable blades carried by the heads, removable shell members also carried by said heads, the. blades and shell members being of a length greater than the distance between the outer walls of the piston-heads and extending over the cams, and rollers carried by the blades and adapted for contact with said cams.

6. A rotary-pump cylinder formed of a plurality of sections, 14, 15, 16 and 17, the sections 14 and 15 being recessed for the reception of the adjacent edges of the remaining sections, flanges forming part of said sections 14 and 15, and securingbolts extending through said flanges to secure the members of the cylinder together.

' In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

EBBIN PATTERSON.

Witnesses:

M. S. LITTLE, DAVID THOMAS.

ITO 

